<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
    <form action = "/login" method="post">
        <input type="text" name="username"><br>
        <input type="password" name="password" placeholder="请输入密码"><br>
        <input type="submit" value = "提交" name="submit">
</body>
</html>